diff --git a/frontend/src/components/mail/MailList.tsx b/frontend/src/components/mail/MailList.tsx
index 3692c09..8d86b69 100644
--- a/frontend/src/components/mail/MailList.tsx
+++ b/frontend/src/components/mail/MailList.tsx
@@ -3,7 +3,7 @@
  * No pagination, no sort header — sorting is in toolbar SortPanel.
  */
 
-import React, { useRef, useEffect } from 'react';
+import React, { useState, useRef, useEffect } from 'react';
 import clsx from 'clsx';
 import { useTranslation } from 'react-i18next';
 import type { Mail } from '@/api/mail';
@@ -12,7 +12,6 @@ import { EmptyState } from '@/components/ui/EmptyState';
 import { Loader2, Paperclip, Star, ChevronDown, ChevronRight } from 'lucide-react';
 import { formatSmartDate } from '@/utils/date';
 import type { GroupedMails } from '@/components/mail/MailGroupPanel';
-import type { Mail } from '@/api/mail';
 
 export interface MailListProps {
   mails: Mail[];